Question on test/tuning motors ?

[KEYTEEM]

My next step in testing my setup is to tune/test the motors . The instructions say to use a lower motor voltage initially,"even 24volts will work for a 200v motor " it just won't have full speed or torque. my motors are
90v and the supply's output ='s 85volts.
Anyone here use a lower voltage when they 1rst tested? It only makes sense
to do this but I don't have another supply , if I have to I will get one just looking for opinions from people that might have already been their.
I have already hooked to the computer and the drives/software/encoders
are functioning ,very simple process , I am really supprised.


Thanx
Den

[vasanthlathes]

Originally Posted by KEYTEEM My next step in testing my setup is to tune/test the motors . The instructions say to use a lower motor voltage initially,"even 24volts will work for a 200v motor " it just won't have full speed or torque. my motors are 90v and the supply's output ='s 85volts. Anyone here use a lower voltage when they 1rst tested? It only makes sense to do this but I don't have another supply , if I have to I will get one just looking for opinions from people that might have already been their. I have already hooked to the computer and the drives/software/encoders are functioning ,very simple process , I am really supprised. Thanx Den

Hello there, If you apply low volts, and the motor is a little tight, you will use more Amperes and if the Drive is a small one with low amps, it may get disabled. Try to use some small motor cycle dry batteries of 12 V 4 numbers in series to be on the safe side. Otherwise, get a trans former, 220/110 to 35 to 50 Volts and put a full wave brifdge rectifier and a Parrallel Capacitor 200uF plus electrolytic and get a voltge of around 60V (smoothed). Put a small fuse say 3Amps between the motor and supply and then do your tuniong.

Remember, to turn the pots (if your DC servo Drive Has) to mid way gain, midway the others and gradually tune until you get no motion on Zero Analog, but the motor holds firm and prevent being turned by your fingers, and then give the Analog input by a 1.5V with a penlight battery.
Go to the Galil or AMC website and compare the servo tuning for their DC Servo Drives.

Regards
Vasantha